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Exam AWS DevOps Engineer Professional topic 1 question 193 discussion

Exam question from Amazon's AWS DevOps Engineer Professional
Question #: 193
Topic #: 1
[All AWS DevOps Engineer Professional Questions]

A DevOps engineer is creating an AWS CloudFormation template to deploy a web service. The web service will run on Amazon EC2 instances in a private subnet behind an Application Load Balancer (ALB). The DevOps engineer must ensure that the service can accept requests from clients that have IPv6 addresses.

What should the DevOps engineer do with the CloudFormation template so that IPv6 clients can access the web service?

  • A. Add an IPv6 CIDR block to the VPC and the private subnet for the EC2 instances. Create route table entries for the IPv6 network, use EC2 instance types that support IPv6, and assign IPv6 addresses to each EC2 instance.
  • B. Assign each EC2 instance an IPv6 Elastic IP address. Create a target group and add the EC2 instances as targets. Create a listener on port 443 of the ALB, and associate the target group with the ALB.
  • C. Replace the ALB with a Network Load Balancer (NLB). Add an IPv6 CIDR block to the VPC and subnets for the NLB, and assign the NLB an IPv6 Elastic IP address.
  • D. Add an IPv6 CIDR block to the VPC and subnets for the ALB. Create a listener on port 443, and specify the dualstack IP address type on the ALB. Create a target group and add the EC2 instances as targets. Associate the target group with the ALB.
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Suggested Answer: D 🗳️
by ds50421 at March 1, 2023, 3:01 p.m.
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easytoo
1 year, 11 months ago
Option D is correct - it involves adding an IPv6 CIDR block to the VPC and subnets for the ALB and specifying the dualstack IP address type on the ALB listener. This allows the ALB to listen on both IPv4 and IPv6 addresses, and forward requests to the EC2 instances that are added as targets to the target group associated with the ALB.
upvoted 1 times
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SHoKMaSTeR
2 years, 1 month ago
Selected Answer: D
IPv6 traffic will be established between ALB and clients. We do not need to take care of EC2 instances.
upvoted 1 times
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catboy
2 years, 2 months ago
D is right
upvoted 2 times
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saeidp
2 years, 2 months ago
Selected Answer: D
D is correct
upvoted 2 times
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Mark1000
2 years, 2 months ago
D Dualstack IP
upvoted 1 times
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CloudFloater
2 years, 2 months ago
Selected Answer: D
A - unnecessary B - unnecessary as ALB is doing the routing C - unnecessary D - meets requirement
upvoted 2 times
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ds50421
2 years, 2 months ago
Selected Answer: D
D is my answer
upvoted 2 times
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